单选题To meet the market requirements, a marine diesel engine should not be of（）A big sizeB fuel economyC low speedD high power

题目
单选题
To meet the market requirements, a marine diesel engine should not be of（）
A

big size

B

fuel economy

C

low speed

D

high power

相似考题

1.One of the factors limiting the amount of toad which can be put on a modem marine diesel engine is the_______.A.governor sensitivityB.exhaust temperatureC.fuel injection pressureD.speed of the cam shaft

2.单选题The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.A principleB principalC causeD case

3.单选题Turbocharging of marine diesel engine is achieved by two distinct methods, （） termed the constant pressure and the pulse system.A respectableB respectfulC respectiveD respectively

4.单选题Most troubles likely to occur with marine diesel engine can, if located in time, be remedied with no difficulty and many can be （）if the engine is maintained with a high sense of responsibility to the people on the part of the motormen and engineers.A found outB eliminatedC avoidedD lowered

更多“To meet the market requirements, a marine diesel engine shou”相关问题

  • 第1题：

    单选题
    Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are （）.
    A

    operated manually once an hour

    B

    operated until the engine has started

    C

    placed into operation only at maximum load

    D

    adjustable to meet lubrication requirements


    正确答案： B
    解析： 暂无解析

  • 第2题：

    单选题
    One of the purposes for water cooling the exhaust manifold in marine diesel engine is to （）
    A

    reduce lube oil temperature

    B

    raise exhaust temperature reduce

    C

    excessive heating of engine room

    D

    reduce load on cooling water pump


    正确答案： C
    解析： 暂无解析

  • 第3题：

    单选题
    Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by （）
    A

    increasing the quantity of starting air

    B

    increasing the lube oil pressure

    C

    heating the engine fuel supply

    D

    heating the engine coolant


    正确答案： A
    解析： 暂无解析

  • 第4题：

    单选题
    The size of the exhaust valve opening is （）
    A

    most critical in a four-stroke cycle diesel engine

    B

    most critical in a two-stroke/cycle diesel engine

    C

    most critical in a four-stroke/cycle diesel engine if it is turbocharged

    D

    of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine


    正确答案： A
    解析： 暂无解析

  • 第5题：

    单选题
    Lubricating oil is supplied to the crank-pin bearings in a marine diesel engine by （）.
    A

    internal crankshaft passages

    B

    immersion in oil

    C

    splash lubrication

    D

    injection lubrication


    正确答案： A
    解析： 暂无解析

  • 第6题：

    单选题
    The following preparations are essential for any （） of marine diesel engine before it may be started.
    A

    doing

    B

    make

    C

    turn

    D

    operating


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    One of the factors limiting the amount of load which can be put on a modern marine diesel engine is the （）
    A

    governor sensitivity

    B

    exhaust temperature

    C

    fuel injection pressure

    D

    speed of the can shaft


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    （）uses one or two high pressure pumps for all the cylinders with one more standby, while（）have a separate high-pressure pump for each cylinder.
    A

    A common rail engine；conventional engines

    B

    A conventional engine；common rail engines

    C

    A marine diesel engine；most other engines

    D

    A two-stroke engine；four-stroke engines


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.
    A

    cylinder covers

    B

    lubricating space

    C

    crosshead

    D

    exhaust manifold


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Compared to a naturally aspirated diesel engine, a supercharged diesel engine has（）
    A

    a cylinder air charge of higher pressure

    B

    increased pumping losses

    C

    less valve overlap

    D

    reduced blow-by


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    A supercharged diesel engine when compared to a similar naturally aspirated diesel engine, will develop an increase in （）
    A

    ignition lag

    B

    engine horsepower

    C

    lube oil system pressure

    D

    specific fuel consumption


    正确答案： D
    解析： 暂无解析

  • 第12题：

    单选题
    Which of the following operating conditions can occur when shims are removed from the joint between the foot of a marine type diesel engine connecting rod and the bearing box?（）
    A

    Decreased connecting rod bearing clearance

    B

    Increased connecting rod bearing clearance

    C

    Decreased compression ratio

    D

    Increased compression ratio


    正确答案： C
    解析： 暂无解析

  • 第13题：

    单选题
    Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?（）
    A

    Exhaust temperature

    B

    Lube oil level

    C

    Lube oil pressure

    D

    Water level in the expansion tank


    正确答案： C
    解析： 暂无解析

  • 第14题：

    单选题
    Before a marine diesel engine is started the cylinders and pistons must be （）.
    A

    cooled to appropriate temperature

    B

    warmed up gradually to appropriate temperature

    C

    opened up and renewed

    D

    ground and polished


    正确答案： A
    解析： 暂无解析

  • 第15题：

    单选题
    Proper lubrication of the main bearing is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because （）
    A

    bearing pressure in a four-stroke/cycle acting single diesel engine is continually reversed

    B

    bearing pressure in a two-stroke/cycle single acting diesel engine is continually reversed

    C

    the maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engine

    D

    two-stoke/cycle diesel engines require more complicated lubrication piping


    正确答案： B
    解析： 暂无解析

  • 第16题：

    单选题
    What is the effect of heated intake air on a diesel engine? （）
    A

    Increases efficiency

    B

    Increases engine horsepower

    C

    Increases engine life

    D

    Reduces engine horsepower


    正确答案： C
    解析： 暂无解析

  • 第17题：

    单选题
    One method of constructing large marine diesel engines and reducing the total engine frame weight is through （）.
    A

    casting interlocking components

    B

    welding plates to form sections for assembly

    C

    forging integral components

    D

    case hardening integral components


    正确答案： C
    解析： 暂无解析

  • 第18题：

    单选题
    Sacrificial zinc anodes are used on the saltwater side of diesel engine heat exchangers to（）.
    A

    reduce electrolytic action on heat exchanger metals

    B

    keep heat transfer surfaces shiny and clean

    C

    prevent rapid accumulation of marine growth

    D

    provide a protective coating on heat exchanger surfaces


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    The diesel engine is a type of （）.
    A

    turbine engine

    B

    gas turbine

    C

    steam engine

    D

    internal combustion engine


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    The jacket water temperature in a diesel engine closed freshwater cooling system is normally controlled by （）
    A

    regulating the level of corrosion inhibitor in the primary cooling system

    B

    the level of the freshwater expansion tank

    C

    varying the engine load to meet temperature requirements

    D

    the operation of the thermostatic valve


    正确答案： B
    解析： 暂无解析

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